Audio system



FIG. 1 is a perspective view of an audio system showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof.

FIG. 7 is a perspective view of another embodiment of an audio system showing my new design;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a rear elevational view thereof;

FIG. 10 is a right side elevational view thereof;

FIG. 11 is a top plan view thereof; and,

FIG. 12 is a bottom plan view thereof.

Portions in broken lines are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for an audio system, as shown and described. 